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Prediscovery Ephemerides for 1997 XF11

Ephemerides are available for the favorable returns of
1957, 1971, 1976,
1983/84, 1990 and
early 1997, in the hopes that
further prediscovery images can be located on archival plates and films.
A current ephemeris
is also available. All the predictions are based on the orbit published on
IAUC 6839.